iriver H120. Rockbox loads, then shuts down.

[sean.gtx]

I hope someone on here might be able to help me, i'm gutted, my H120 seems to be no more
It's got plenty of charge in it, I can't even get it to load up whilst its plugged in. Here's whats happening.

It starts to load up and displays:

Rockbox boot loader
Version 6
Batt: 4.21V
Loading Firmware
Lenght: 7A6D0
Check sum: 25C2725
Model name: h120

Then it loads the big ROCKbox logo and says Ver. 3.13 at the bottom.

All good up until this point,
Then it loads up the menu screen. Files, Database, etc....

Then after just a second or 2, displays "shutting down".

I'm trying to upload a video now so you can see exactly what's happening. If there is anyone out there that could point me in the right direction I would be so grateful.

Heres the Vid: https://www.youtube.com/watch?v=QE5Kelsm_3M

[monoid]

Hard to say, what happens.

I would try to reinstall RockBox. And also would try to check if off button is not pressed. It may be broken... One of the buttons on my H120 stopped working.

[sean.gtx]

Thanks for replying monoid 
I can't re-install Rockbox because I've got no way of communicating with the unit. When I plug it in to the PC it just shuts down after a few seconds as you can see on the video. I might take it apart to see if I can see anything wrong with the buttons, but they appear to be fine from the outside :-(.

Anyone else have any ideas?